The suspected mastermind of both attacks, Chamseddine Sandi, has never been caught and is thought to be hiding in Libya.

Image:Terrorists killed 22 people at the Bardo Museum

Police say the defendants denied participating directly in the attacks during questioning, but several of them acknowledged they had provided logistical assistance to Sandi.

British victims of the beach terror attack, along with relatives of those who died, launched legal action against holiday firm TUI last year.

Represented by legal firm Irwin Mitchell, the group of more than 80 people will challenge the adequacy of security at the Imperial Hotel at the resort and information provided to TUI customers about the level threat in Tunisia.

Irwin Mitchell hopes the civil proceedings will result in damages being awarded for clients.

In 2017, an inquest into the deaths of the British victims found they had been "unlawfully killed" but a coroner rejected a finding of neglect against tour firms and the hotel.

Judge Loraine-Smith also ruled the Tunisian police response was "at best shambolic and at worst cowardly".

Tunisia's tourism industry was devastated by the attacks but has been bolstered after the government introduced a number of measures to protect popular destinations.